The film's plot is based on the real murder of the Soviet diplomatic courier Theodor Nette abroad. The pouch of the Soviet diplomat, which is stolen by British spies, is taken away by the sailors of a ship sailing to Leningrad who deliver it to the authorities. The intelligence agents make every effort to retrieve the bag.
The young, attractive Inge Wagner becomes acquainted with Herbert Koch during the Berlin Olympics, his flight officer insignia having first caught her eye. Sparks fly immediately between the two and they soon decide to marry. But Herbert is called off on a secret mission in Spain.
Set in Odesa at the end of the Civil War when the town is occupied by the Whites. The night coachman, fifty-year-old Hordiy Yaroshchuk, lives with his daughter Katya who gets involved with a Bolshevik and revolutionary.
